OK, I suspect the pressure switch isn't rated for that much current thus the contacts welded themselves together. A new pressure switch is likely to eventually do the same. If you have the option to use a 240V outlet the problem will go away (the current through the switch is 1/2 as much at 240V).
I generally like Condor pressure switches. If you look on Amazon you will find prices very greatly for what largely look like the same switch. The things I would worry about if buying one are:
1. Do you need a 4 way base or a 1 way base. Looking at your picture it looks like a 1 way base. A 4 way base just means you have to plug a number of holes with caps.
2. Your picture shows you will need an unloader valve on the switch.
3. What type of wire clamp do you want to use. Yours appears to use those wire clamps that work with metal electrical boxes. Mine used a clamping bar built into the switch. If you look at these two listings you can see the difference. One clamps the wires on the bottom, the other uses the box things on the side. This is largely a preference thing (note both of these show a 4 way base
https://www.amazon.com/dp/B07J2X2MHP/?tag=atomicindus08-20 -> 1-way base
4. Pressure range. This one isn't critical as you can adjust the cut in and cut out pressures but if you can find one that's correct out of the box, well that's just easier.
When I was searching I found prices for roughly the same switch varied from $20 to $50+. If it was listed as for a specific model compressor it often cost more. I was lucky and found a switch that was basically a direct replacement for mine for around $25. If the "correct" part was more like $50 I would have found one that was correct other than the pressure range and adjusted it.
OK, final thing, if you have to stay with 120V then I see three options.
*Replace switch and understand the new one is likely to have a short life due to the high current load.
*Replace the motor with one that doesn't draw more than 15A
*Add a magnetic starter. The starter is basically a relay that is triggered by the pressure switch but can handle the higher current load. So the current seen by the pressure switch would drop to perhaps 1A and the starter would handle the high current. This is an example of a starter
https://www.amazon.com/dp/B09DTBVZ4P/?tag=atomicindus08-20
